Topic
Embedment
About: Embedment is a research topic. Over the lifetime, 2441 publications have been published within this topic receiving 31444 citations.
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10 Feb 2016
TL;DR: In this article, a new apparatus known as Minova Axially Split============Embedment Apparatus (MASEA) was used to study load-displacement characteristics of smooth versus vertically profile cable bolts.
Abstract: The load transfer mechanisms of cable bolts differ from normal rebar bolts. Cable bolts used in mines are basically steel strands with different constructions depending on the number of wires or elements and the way that these elements are laid. Tendon bolts (rebar and cable) are normally
evaluated for strength and load transfer properties. The strength of tendon can be carried out by tensile
failure tests, while the load transfer strength is evaluated by pull and shear strength tests. Short
Encapsulation Pull Testing (SEPT) is used to study of the load transfer capacities of tendons, and can
be undertaken both in the laboratory and in situ. A new apparatus known as Minova Axially Split
Embedment Apparatus (MASEA) was used to study load-displacement characteristics of smooth versus
spiral profile cable bolts. Minova Stratabinder grout was used for encapsulating 400 mm long 19 wire 22
mm diameter superstrand cable in the embedment units. The anchorage of the cable on two sides of the
embedment apparatus were intentionally installed at different lengths, to allow the cable to be pulled out
from one side of the anchorage. The spiral wire strand cable bolts achieved higher peak pull-out load at
minimum displacement in comparison with smooth surface wire strand. The peak pull out force increased with the age of encapsulation grout. The MASEA was easier to assemble and test at a short period of time, thus allowing quick and repeated tests to be undertaken.
10 citations
TL;DR: In this article, a simple method for the anti-overturning design of a rigid retaining wall for foundation pits in unsaturated soils is presented, where the earth pressure of the Rankine theory is adopted to derive the resisting and driving moments with respect to the toe of the retaining wall.
Abstract: The soils surrounding foundation pits are commonly unsaturated, but routine anti-overturning calculations of retaining walls are conducted assuming saturated soil mechanics. The primary objective of this paper is to present a simple method for the anti-overturning design of a rigid retaining wall for foundation pits in unsaturated soils. The earth pressure of the Rankine theory for unsaturated soils is adopted to derive the resisting and driving moments with respect to the toe of the retaining wall. The closed-form equations of embedment depth are derived with two different distributions of matric suction. The obtained result is easy to use and has wide applicability and excellent extensibility by considering comprehensive effects from many factors. The validity of the proposed simple method is demonstrated by comparing it with a lower bound solution. Engineering application procedures for this simple method are detailed, and parametric studies about a new defined overturning buried coefficient ar...
10 citations
Journal Article•
TL;DR: In this article, the experimental study of the bond-slip behavior between steel and concrete in SRC structures is analyzed and several important parameters are discussed, such as the distribution mode of bond stress and slip along the embedment length of the SRC interface, as well as the relationship between the bond force and slip are also studied.
Abstract: Based on the experimental study of the bond-slip behavior between steel and concrete in SRC structures, the bond-slip mechanism between steel and concrete is analyzed and several important parameters are discussed. The distribution mode of bond stress and slip along the embedment length of steel and concrete interface, as well as the bond-slip relationship between the bond force and slip are also studied, and their equations are provided. The calculating method of bond strength, slip value and bond failure load are presented. Good agreement with the experimental results is reached. According to the punching failure principle of concrete slab, a determining method for critical thickness of concrete cover is proposed. The present results are believed to be useful for further study of bond-slip relationship and bond failure criterion between steel and concrete as well as the improvement of calculating theory of strength, stiffness, deformation, crack width and finite element analysis of SRC structures.
10 citations
TL;DR: In this article, the authors provide an evaluation of the database including the available experimental results, as well as the assessment of some of the equations from the literature, which proves that there are parameters that are not sufficiently investigated, such as the effect of cyclic actions and the limited embedment length of interface reinforcement on the behavior of interfaces.
10 citations
26 Nov 2013
TL;DR: In this paper, results from a parameter study, using calibrated numerical modelling procedures, on lateral buckling of subsea pipelines are presented, including pipe diameter to wall thickness (D/t) ratio, pipe out of straightness (OOS), operating temperature and internal pressure, external pressure associated with the installation depth, and seabed lateral and axial friction properties.
Abstract: Subsea pipelines are subject to load effects from external hydrostatic pressure, internal pressure, operating temperature, ambient temperature and external reactions (e.g. seabed, structural support). These parameters influence the effective axial force that governs the pipeline global buckling response. Other factors, including installation stress, seabed slope, soil type, and embedment depth, can influence the pipe effective force.Pipelines laid on the seabed surface or with limited embedment may experience lateral buckling. The resultant mode response is a complex function related to the spatial variation in these parameters and kinematic boundary conditions.In this paper, results from a parameter study, using calibrated numerical modelling procedures, on lateral buckling of subsea pipelines are presented. The parameters included pipe diameter to wall thickness (D/t) ratio, pipe out of straightness (OOS), operating temperature and internal pressure, external pressure associated with the installation depth, and seabed lateral and axial friction properties.Copyright © 2013 by ASME
10 citations